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If a population growing exponentially do...

If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?

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Intrinsic rate of increase (r) of the population can be calculated from the following equation:
`rN = (dN)/(dt)` where N = Population size
`(dN)/(dt)` = Rate of change in population size r is 0.667.
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